Home / 20,740.54-28,622.49-12,788.02

Finding the Fourth Proportional to 20,740.54, 28,622.49 and 12,788.02

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Solution

The fourth proportional to 20,740.54, 28,622.49 and 12,788.02 is: 17,647.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.54 : 28,622.49 = 12,788.02 : x
  2. Step 2: Convert to fraction form
    20,740.54/28,622.49 = 12,788.02/x
  3. Step 3: Cross multiply
    20,740.54x = 28,622.49 × 12,788.02
  4. Step 4: Simplify right side
    20,740.54x = 366,024,974.57
  5. Step 5: Solve for x
    x = 366,024,974.57/20,740.54
  6. Step 6: Final answer
    x = 17,647.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.